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If Fran jumps straight up off the floor and lands on her [#permalink]
04 Feb 2007, 07:17

00:00

A

B

C

D

E

Difficulty:

(N/A)

Question Stats:

100%(00:00) correct
0%(00:00) wrong based on 1 sessions

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

1.If Fran jumps straight up off the floor and lands on her feet T seconds later, her feet will reach a max-imum height of 1.22T^2 meters above the floor. On one such jump, was Fran off the floor for less than 1 second ?
(1) On her jump Franâ€™s feet reached a maximum height of 1 meter above the floor.
(2) On her jump Fran spent more than 1/4 second ascending.

2.Are all of the numbers in a certain list of 15 numbers equal?
(1) The sum of all of the numbers in the list is 60.
(2) The sum of any 3 numbers in the list is 12.

3.The price of a television set was reduced by 25 percent. What was its original price?
(1) The reduced price was $187.50.
(2) The original price exceeded the reduced price by more than $60.00. _________________

1.If Fran jumps straight up off the floor and lands on her feet T seconds later, her feet will reach a max-imum height of 1.22T^2 meters above the floor. On one such jump, was Fran off the floor for less than 1 second ?(1) On her jump Franâ€™s feet reached a maximum height of 1 meter above the floor.(2) On her jump Fran spent more than 1/4 second ascending.

Sorry, I type first quention incorrect , so I post again for your explaination

1.If Fran jumps straight up off the floor and lands on her feet T seconds later, her feet will reach a max-imum height of (1.22T)^2 meters above the floor. On one such jump, was Fran off the floor for less than 1 second ?
(1) On her jump Franâ€™s feet reached a maximum height of 1 meter above the floor.
(2) On her jump Fran spent more than 1/4 second ascending. _________________

Sorry, I type first quention incorrect , so I post again for your explaination

1.If Fran jumps straight up off the floor and lands on her feet T seconds later, her feet will reach a max-imum height of (1.22T)^2 meters above the floor. On one such jump, was Fran off the floor for less than 1 second ?(1) On her jump Franâ€™s feet reached a maximum height of 1 meter above the floor.(2) On her jump Fran spent more than 1/4 second ascending.

With or without the correction I would say it is A:

number 1) gives the height, so we can determine the time spent on the whole jump. SUFF

The 2) says that Fran ascended more than 1/4 seconds, it could have been: 3/8 seconds, 1/2 or even 1 second ascending. INSUFF